Sugar mill



F. HEGENBARTH SUGAR MILL Filed Aug.

Aug. 18, 1931.

Patented Aug. 18, 1931 UNITED STATES PATENT OFFICE FRANCIS HEGENBARTH,OF NEW ORLEANS, LOUISIANA, ASSIGNOR T0 FULTON IRON `WORKS COMPANY, OFST. LOUIS, MISSOURI, A CORPORATION 0F DELAWARE SUGAR MILL Applicationled August 14, 1929. Serial No. 385,864.V

This invention relates generally to sugar millsv and more specificallyto im roved means for applying pressure to the oating rolls of suchapparatus, the predominant object of the. invention being to providesugar mills with means whereby the hydraulic pressure per square inch,which is applied tothe top roll of a sugar mill at one side thereof,

- is greater than is the hydraulic pressure applied to said top roll atthe opposite side of the mill.

In the operation of sugar mills having driving pinions or crown wheelsat one. side only of the mills, there is a tendency for thehydraulically loaded floating top rolls of the mills to rise more on theside of the mills at which the crown wheels arelocated than at theopposite side thereof. The purpose of the present invention is to remedythis situation and I accomplish this purpose by applying greaterhydraulic pressure per square inch to the floating top rolls at thecrown wheel ysides of said rolls than at the opposite sides lthereof.Heretofore it has been proposed to accomplish this purpose by employinghydraulic rams at the o-pposite sides of the floating rolls which are ofdifferent areas, whereby theI pressure exerted against the rolls atopposite sides thereof will dil'er even though the pressure per squareinch of the pressure exerting medium acting against the oppositelydisposed rams is the same.

While this system functioned with some eiliciency it had severaldisadvantages which are eliminated in the use of the present inventionwhich briefly stated comprises utilizing a single accumulator fordistributing two different hydraulic pressures to the floating top rollof a sugar mill. The two pressures referred to are obtained through theuse of my improved differential hydraulic ram, and this differentialhydraulic ram is so constructed that parts thereof may be convenientlyreplaced with corresponding parts of different dimensions for thepurpose of varying the pressures distributed by said differentialhydraulic ram.

Figure 1 is a vertical section of a sugar purpose of illustration,merely, one embodi-V ment of the invention A designates a sugar millwhich comprises the usual bottoni rolls B (only one of which is shown)and the usual floating top roll C. The rolls B and C are supported forrotary movement by the mill housing or rame'D, the neck portions of saidrolls being supported in suitable bearings. E designates the meshingdriving pinions, or crown wheels as they are called, said crown wheelsbeing fixed to neck portions of the rolls in the usual manner and beinglocated at one side only of the mill A.

Located above the neck portions of the top floating roll C of the mill Aat opposite ends of said top roll are top caps F and G, the top cap atthe crown wheel side of the mill being designated by the referencecharacter F and the top cap at the opposite side of the mill beingdesignated by the reference character G. The top caps F and G areprovided with ram cylinders F and G respectively into which rams H and Jare extended, said rams being provided at their lower ends with plates Hand J which contact with the neck portions of the top roll C.

K designates an accumulator of ordinary construction which includes acylinder L from which a pipe 1 leads to the top cap F. 2 des,- ignates apipe which is connected to t-he pipe 1 as shown in Figure 2, said pipe 2leading from said pipe 1 to the upper end of my improved differentialhydraulic ram R. The differential hydraulic ram R of my improvedapparatus comprises an upper cylinder 3 and nder 4 is provided with asimilar annular Ilange 4', these flanges being arranged in contact withthe plates 5 and 6 respectively and fastening devices 9 being extendedthrou ja the plates and into the annular flanges ot the cylinders forthe purpose ol securing the cylinders 3 and 4 to the plates 5 and G.rThe lower cylinder 4 et the differential hydraulic ram R is of largerdiameter than the cylinder 3 of said hydraulic ram and the significanceof this difference of diameters of said cylinw 1ers will be subsequentlypointed out herein.

Disposed within the upper cylinder 3 ot the. differential hydraulic ramR is a ram l() and arranged within the lower cylinder 4 of saidhydraulic ram 4 is a ram 11. The rams l0 and 11 fit closely within theirrespective cylinders and because the'lower cylinder 4 is ot' greaterdiameter than the upper cylinder 3 the ram 11 is of correspondinglygreater diameter than the ram 10. The upper end of the upper cylinder 3and the lower end of the cylinder 4 are closed as shown in Figure 2 andspaces 12 and 13 respectively are provided between the upper end of theram 10 and the top wall of the upper cylinder 3 and between the lowerend of the ram 11 and the bottom wall of the lower cylinder 4. Attheirinner ends the rams 10 and 11 contact with each other, the ram 10 beingprovided with a rounded lower end 14 which rests in a correspondinglyshaped seat 15 formed in the top tace of the ram 11. This arrangementprovides for proper Contact between the rams l0 and 1l even though oneor the other tl not gets slightly out of alinement with resi i theassociated ram. The cylinders and 4 'it the differential hydraulic ramld. are provided each with a packing gland 16 of ordinary constructionwhich serve to compress the packing material 17 and in this mannerprevent leakage of fluid from the cylinders through the space betweenthe outer faces ot the rams and the inner faces of the cylinders.

As already stated the pipe 2f leads from the pipe 1 to the upper end ofthe upper cylinder 3 of the differential hydraulic rain il, there beinga valve 18 in said pipe 2 which may be employed to control passage fluidtherethrough. 19 designates a pipe which communicates with the interiorof the lower cylinder 4 or the dillierential hydraulic ram ld said pipe19leading f om said cylinder 4 to the ram cylinder G w n the top cap C:Ere tended from the pipe 2 to pipe is a Short section ott pipe 2G, saidsection of pipe is connected to said p is likewise provided i.. locatedabove the po 20 is connecte-r1 designate dr c l from the cylinderdifferential hydraulic ram R, said drain pipes being provided withvalves 26 for controlling passage ot fluid through said pipes.

ln the operation of a sugar mill equipped with my improved apparatushydraulic pressure is first bulit up in the accumulator K by means ofthe commonly used hydraulic pump, this being done with the Valve 18 inan open position. The Valve 18 is then closed and the low pressure lineconsisting of the rain cylinder G inthe top cap G, pip'e 19, and space13 beneath the ram 11 in the lower cylinder 4 of the dill'erentialhydraulic ram is filled with fluid under pressure by opening the valvesQ1. 22, and 23. At this time the pressure in all ot' the piping and inthe space 1Q and 13 within the upper and lower cylinders 3 and 4 ot` thedifferential hydraulic ram R is the same, 'for instance, 4,500 lbs. persquare inch, as delivered from the accumulator cylinder L. Due to thelarger area of the bottom face of the ram 11 this pressure will forcethe ram 11 and the ram 10 upwardly to a predetermined point and uponsuch point being reached the Valve 21 will be moved to a closedposition. In this manner there will be created a high pressure linewhich includes the pipes 1 and Q, and an independent low pressure linewhich includes the pipe 19. During operation ot the sugar mill, the lowpressure mill ram .l will rise and the fluid' from the rz :n cylinder Gin the top cap G will 1oe forced through the piping into the space 13below the ram 11 of the dilierential hydraulic ram R, thus moving therams 11 and 10 upwardly and forcing fluid through the pipes 'l and 2 tothe ram cylinder ll" above the mill ram lll at the crown wheel side ofthe sugar mill A, The amount of liquid to be accommodated in the space13 helow the ram 11 will determine the stroke of the ram 1.1 and of theram 10.

An important feature ot the invention is that the ditl'erentialhydraulic ram R is so constructed that it is a simple matter to replaceeither the upper or the lower cylinder of said hydraulic rain with a,cylimler and ram oi a. different size should the chosen ratio not 'workout to complete satisfaction.

l claim:

1. A hydraulic equalizer comprising a. pressure regulating element, amovable ele* ment disposed within said pressure regulating element,pressuire-responsive means at opposite ends of a member with which theergiializer is associated, a. pressure coiiductor leading from one endof said pressuresreguto the pressure ri'isponsive 'a l `Y-ieu'iber withwhich lating element element being of greater diameter and area than theface at the opposite end thereof.

2. A hydraulic equalizer comprising a pressure regulating element, amovable element disposed Within said pressure regulating element, meansWithin Which said movable element. is movable longitudinally of the axisthereof, pressure-responsivek means at opposite' ends of a member withwhich the equalizer is associated, a pressure conductor leading from oneend of said pressure-regulating element to the pressure responsive meansat one end of said member With Which the equalizer is associated, and apressure conductor leading from the opposite end of saidpressure-regulating element to the pressure responsive means at theopposite end of said member, the face at one end of said movable elementbeing of greater diameter and area than the face at the opposite endthereof.

3. A hydraulic equalizer comprising, ak

pressure regulating element, a movable element disposed Within saidpressure regulating element, cylindrical means Within which said movableelement is movable longitudinally of the axis thereof,pressure-responsive means at opposite ends of a member with which theequalizer is associated, a pressure conductor leading from one end ofsaid pressure-regulating element to' the pressure responsive means atone end of said member With Which the equalizer is associated, and apressure conductor leading from the opposite end of said movable elementto the pressure responsive means at the opposite end of said member, theface at one end of said movable element being of greater diameter andarea than the face at the opposite end thereof.

4. A hydraulic ,equalizer comprising a pressure regulating element, amovable element disposed Within said pressure regulating el-ement,oppositely disposd cylinders in which the opposite end portions of saidmovable element moves, pressure-responsive means at opposite ends of amember With Whichthe equalizer is associated, a pressure conductorleading from one of said cylinders to the pressure responsive means atone end of said member With which the equalizer is associated, and apressureconductor leading from the other cylinder to the pressureresponsive means-at the opposite end of said member, the face at one endof said movable elem-ent being of greater diameter than the face at theopposite end thereof.

5. A hydraulic equalizer comprising a pressure regulating element, amovable element disposed Within said pressure regulating element, saidmovable element comprising a pair of rams arranged to abut With eachother at their inner ends, oppositely disposed cylinders in which theopposite end portions of said movable element moves, pressure-responsivemeans at opposite ends of a member With Which'the equalizer isassociated, a pressure conductor leading from one of said cylinders tothe pressure responsive means at one end of said member with Which theequalizer is associated, and a pressure conductor leading from the othercylinder to the pressure responsive means at the opposite end of saidmember, the face at one end of said movable element being ofv greaterdiameter than the face at the opposite end thereof.

6. A hydraulic equalizer comprising a pressure regulating elementincluding a pair of oppositely disposed cylinders, rams arranged forlongitudinal movement Within said cylinders, said rams having endsthereof arranged in abutting relation, one of said cylinders, and theram associated therewith being of greater diameter than the othercylinder andD ram, pressure-responsive meansat opposite ends of a memberwith Which the equalizer is associated, a pressure conductor leadingfrom one of said cylinders to the pressure responsive means at one endof said member with which the equalizer is associated, and a pressureconductor leading from the other cylinder to the pressure responsivemeans at the opposite end of said member.

7. A hydraulic equalizer comprising a pressure regulating elementincluding a pair of oppositely disposed cylinders, rams arranged forlongitudinal movement within said cylinders, said rams having endsthereof arranged in abutting relation, and the end of one ram whichabuts against the other ram being curved and being seated in acorrespondingly shaped recess in said other ram, one of said cylindersand the ram associated therewith being of greater diameter than theother cylinder and ram, pressure-responsive means at opposite ends of amember with which the equalizer is associated, a pressure conductorleading from one of said cylinders to the pressure responsive means atone end of said member with which the equalizer is associated, and apressure conductor leading from the other cylinder to the pressureresponsive means at the opposite end of said member.

8. A hydraulic equalizer comprising a pressure regulating elementincluding a pair of oppositely disposed cylinders, rams arranged forlongitudinal movement Within said cylinders, said rams having endsthereof arranged in abutting relation, one of said cylinders and the ramassociated therewith being of greater diameter than the other cylinderand ram, means for supporting said cylinders and the rams associatedtherewith, said cylinders and the associated rams being independentlyremovable from said supporting means, pressure-responsive means atopposite ends of a member with which the equalizer is associated, apressure conductor leading from one of said cylinders to the pressureresponsive means at one end of said member with which the equalizer isassociated, and a pressure conductor leading from the other cylinder tothe pressure responsive means at the opposite end of said member.

9. A hydraulic equalizer comprising a pressure regulating element., anaccumulator for supplying pressure to said pressure regulating element,a movable element disposedv Within said pressure regulating element,pressure-responsive means at opposite ends of a member with which theequalizer is assoeiated, a pressure conductorleading from one end ofsaid pressure-regulating element to the pressure responsive means at oneend of said member with which the equalizer is associated, and apressure conductor leading from the opposite end of saidpressure-regulating element to the pressure responsive means at theopposite end of said member, the face at one end of said movable elementbeing of greater diameter and area than the face at the opposite endthereof.

10. A hydraulic equalizer comprising a pressure regulating element, amovable element disposed Within said pressure regula-ting element,pressure-responsive means at opposite ends of a member with Which theequalizer is associated, a pressure conductor leading from one end ofsaid pressure-regulating element to the pressure responsive means at oneend of said member with which the equalizer is associated, a pressureconductor leading from the opposite end of said pressure-regulatingelement to the pressure responsive means at the opposite endof saidmember, a conductor for placing said pressure conductors incommunication With each other, the face at one end of said movableelement being of greater diameter and area than the face at the oppositeend thereof.

In testimony that I claim the foregoing I hereunto aix my signature.

FRANCIS HEGENBAR'IH.

